For example If I want to make soil salinity 15 dS/cm, how much salt I have to add in a particular soil?
Dear Sir,
pl check it.
http://waterquality.montana.edu/energy/cbm/background/soil-prop.html
http://soiltesting.tamu.edu/publications/E-60.pdf
http://www.fao.org/docrep/R4082E/r4082e08.htm
In thumb rule salt concentration 1g/L will elevate EC approximately 1.5 millimohs/cm; of course it definitely depend upon what type of salts you are adding as Dr. Meena pointed. For example, 10 mM NaCl has an EC close to 1dS/m =1mmhos/cm . On the other hand for 10mM KCl = 1.2dS/m and 10mM MgCl2 = 1.6 dS/m. Consistently applying irrigation water having an elevated salinity is the easiest way to elevate salinity in the soil.
hi Abu Khayer,
Two aspect should be emphasized in increasing salt concentration in your soil
1. Salt concentration ( mmolec/L) is directly proportional to the EC ( dS/m) of your saline salution, we usely use this relationship : C ( mmolec/L) = 10 EC but the factor of proportionnality of 10 is dependent on the type of salt as Dr Tarafdar and Meena point out.
2. you Must consider that bulk density of your soil sample, and you should calculate the pore volume , which is the volume of water or solution that is needed to fully saturate your soil. usually you will need some pore volume to fully saturate your soil with your target salinity.
I hope it will help
Kind regards
Yacine Louadj
Dear Sir,
beside the differences in EC of various salts as mentioned above, also your soil will have an importance influence - especially CEC and base saturation. Thus, you should prepare various samples of your particular soil, add the salts you want to use in your experiment and measure soil salinity after equilibrium is reached. Maybe you need to measure soil salinity at several dates until values become stable.
Kind regards
Dieter
Dr. Lohr, you have pointed the right thing. In our experiment we find that at least three weeks time is required to reach the equilibrium after adding the salts.
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